AP_Scripting: add bindings for get_circle_radius, set_circle_rate

libraries/AP_Scripting/generator/description/bindings.desc

@@ -195,6 +195,8 @@ singleton AP_Vehicle method get_control_output boolean AP_Vehicle::ControlOutput
 singleton AP_Vehicle method get_target_location boolean Location'Null
 singleton AP_Vehicle method set_target_velocity_NED boolean Vector3f
 singleton AP_Vehicle method set_target_angle_and_climbrate boolean float -180 180 float -90 90 float -360 360 float -FLT_MAX FLT_MAX boolean float -FLT_MAX FLT_MAX
+singleton AP_Vehicle method get_circle_radius boolean float'Null
+singleton AP_Vehicle method set_circle_rate boolean float -FLT_MAX FLT_MAX
 singleton AP_Vehicle method set_steering_and_throttle boolean float -1 1 float -1 1
 singleton AP_Vehicle method get_wp_distance_m boolean float'Null
 singleton AP_Vehicle method get_wp_bearing_deg boolean float'Null